maven - Extract version ID from POM in a Jenkins pipeline

Question

I've created a pipeline and using the embedded groovy pipeline script definition and can't seem to get the version ID of the project from the POM. I tried this which works in a groovy console but on in the Jenkins build pipeline script:

def project = new XmlSlurper().parse(new File("pom.xml"))
def pomv = project.version.toString()

According to the documentation Jenkins has a $POM_VERSION but the value doesn't have anything in it when I assign it to a variable and echo it out.

def pomv = "$POM_VERSION"

OR

def pomv = '$POM_VERSION"

Answer 1

Use readMavenPom like this:

pom = readMavenPom file: 'pom.xml'
pom.version

See Model reference for properties (like the above version).

For this to work, one has to install Pipeline Utility Steps plugin